@bkrolex Here's one I saw in a Dave Tate video, for deadlifts. Can't find the video, so I'll describe it. He had the guy stand there, and marked chalk on his shorts where his fingertips hit.
Then he told him (still just standing there) to move his fingers lower. No, lower. Lower than that. Without bending hips or anything, just doing the opposite of a shrug.
Then he had the guy deadlift. When your shoulders are as low as possible, your lats are engaged and you're not wasting energy moving the bar any higher than it needs to go.
I tried it myself and it made a huge difference. As a trainer I've often noticed that people want to bring their shoulders down and back when they deadlift, but pulling your shoulder blades
back isn't doing you any favors at all. Bring your shoulder blades
down.